In radicalizing your apathetic sympathizers, you have no better ally than the violent extremists on the other side . Only they can convince your people that compromise is impossible. Only they can raise your countrymen's level of fear and despair to the point that large numbers are willing to take up arms and follow your lead. A few blown up apartment buildings and dead schoolchildren will get you more recruits than the best revolutionary tracts ever written.
Perversely, this means that you are the best ally of the extremists on the other side. That doesn't mean you love or even talk to each other -- they are, after all, vile and despicable demons. But at this stage in the process your interests align. Both of you want to invert the bell curve, to flatten out that big hump in the middle and drive people to the edges.
from Daily Kos :: Political Analysis and other daily rants on the state of the nation.. via How To Save The World - do go and read the rest - it is brilliant.